Is your own biological central processing unit working hard? Make sure that it doesn't overheat by installing an external fan. Flickr member marginal_220's cooler has already proven to be an effective heat sink.
Didn't Marlin Brando wear a "cranial cooling unit" in Island of Dr. Moreau? (And isn't there some evidence that cooling the brain *does* make it work better?)
(And isn't there some evidence that cooling the brain *does* make it work better?)